Apparatus for continuous evaporation.



N.-881523. P 'NED.A.10108.

o H.WINTER. ATET MR P APPARATUS FOR CONTINUOUS EVAPORATION.

APPLICATION TILED OCT. 3 1, 1904.

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PATENTED MAR. 10, 1908.

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H. WINTER.

APPARATUS FOR GGNTINUOUS EVAPORATION.

" APPLICATION FILED 001'. 31, 1004.

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chambers are so connected with eac UNITED sTArns rn rnnr OFFICE.

HEINRICH war-Es, OF CHARLOT'TENBURG, GERMANY.

APPARATUS FOR oon rnv'uous EVAPORATION.

To all whom it may concern:

Be it known that I, HEINRICH WINTER, doctor of philosophy, citizen of the German Empire, and a resident of L50 Kantstrasse, Charlottenburg, near Berlin, Germany, have invented new and useful Improvements in Apparatus for Continuous Evaporation, of which the following is a specification.

The present invention relates to an improved apparatus for continuous evaporation. The princi le of the evaporationis based on the wel known fact, that, not as heretofore, already evaporated liquid particles are mixed with nonconcentrated liquid and conducted over the same heatingsurfaces, but that all liquid particles are continuously concentrated and continuously placed in contact with new heating-surfaces. From thisit results that the time of heating is shortened as much as possible and the evaporation rendered as quick as possible, so that chemical decompositions are avoided. The advantages of this system are in practical use and are used among others in the Yorgau-a paratus. In this apparatus long horizonta tubes are employed in which scale is easily formed, while in the present invention short vertical heating-tubes are used in which scale formation is avoided and in which a number of other essential differences are shown.

The invention consists in the combination of a plurality of individual evaporators placed in a common shell or casmg, each evaporator being provided with a chamber having heating-surfaces for the ascending and a non-heating chamber for the descending liquid (return-current). The airs of other that a non-heating chamber of the first pair is connected with the lower end of the heating-chamber of the second pair and so on, so that the liquid passes successively through all the chambers and is more and more concentrated in the, heating-chambers. The dividing-partitions between the individual evaporators do not extend entirely to the upper part ofthe casing, so that the vapors can be drawn off through the cover of the same. The heating of the heating-chambers can be accomplished in any suitable manner, either by steam of difierent pressures or by coils or other heating-bodies, preferably, however, by means of vertical tubes and a heated plate which is inclined towards the return-chamber. The return- Specification or Letters Patent. Application filed October 31, 1904:.

Patented March 10, 1908.

Serial No. 230,846.

chambers are insulated from the heatingchambers to such an extent that in the former no steam can be generated.

In the accompanying drawing, in which different forms of apparatus constructed in accordance with the invention are illustrated diagrammatically, Figure 1 is a plan-view of one form of the apparatus, Fig. 2 is a section of a horizontal evaporating apparatus with short straight tubes, in which the return-chambers are of the same size as the heating-chambers, Figs. 3 and 4 are planviews of an evaporator in which the returnchambers are smaller than the heatingchambers, Figs. 5 and 6 are respectively a section and a lan-view of an upright evaporator of modi ed form, and Figs. 7 and 8 also show an upright evaporator of still further modified construction.

In the drawing a represents the heating tubes, b the steam-space of the heatingchambers and c the space for the vapors.

d indicates the unheated return-chambers andf the discharge-tube for the vapors.

The liquid to be evaporated passes through an inlet Q1 into the apparatus and out through an outlet lc. Each heating-chamber is separated from the adjacent return-chamber by a partition m, and between the individual evaporators and the pairs of chambers are partitions 0.

In the evaporator shown in Figs. 5 and 6 the chambers are arranged in the shape of sectors in a cylindrical shell or casing. The liquid enters at i from below into the heatingtubes, runs over the upper inclined heatinglate in downward direction into the noneated adjacent chamber d, enters then into the next following heating-chamber and so on until it is dischar ed at the lower end of the last return-cham er.

Figs. 7 and 8 re resent also an upright evaporator in whic the heating-chambers form an exterior ring, while the return-chambers are formed in the shape of sectors in the inside spaces. The upper heating-plates are inclined in inward direction so that the liquid is conducted into the return-chamber and from the same at the lower end into the next heating-chamber.

What I claim is:

In an apparatus for continuous evaporation, the combination of a casing and pairs of chambers within said casing spaced from the top thereof, each pair comprising a heatingchamber and a collectingor return-chamber,

the heating-chamber being provided with my invention, I have signed my name in hfiittingl-tubes ang arll1 upplelr h6atiILg-Pigt6 presence of two subscribing Witnesses. o i uey situate t e co ectin c am er r com r nunicating at its lower portioi With the HEINRICH 5 adjacent heating-chamber of the next pair of Witnesses:

chambers. v HENRY HAsPER, In testimony, that I claim the foregoing as An. FRIEDMANN. 

